JPH09171361A - Light controlled visual sign - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a light controlled visual sign in which various image changes are accomplished for a displayed color picture by providing the light sources for red, green and blue three primary colors and a light controller which individually turn of and off each light source in a light box. SOLUTION: Portions of the light beams emitted by three primary color light sources 2 (red color light sources 2R, green color light sources 2G and blue color light sources 2B) are shielded by a light shielding layer. Other portions are made into the light components, which are slantingly made incident on a front diffusing plate 5, and the light components which are reflected by a back surface wall section and then, made incident on the plate 5. While being diffused by the plate 5, a surface display medium 6 is illuminated from the inner side to display a scenery picture. At that time, the illuminating light beams are changed to any one of the primary colors of white, yellow green, yellow, red purple, red, blue and green by the combination of turning on and off of the light sources 2 through a light controller 3. Thus, various picture images are displayed by selecting the combination of turning on and off the light sources 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internally illuminating dimming visual sign capable of changing the displayed color image in various ways, for example, the same landscape image can be changed in the morning, noon, and evening. Regarding dimming visual signs.

[0002]

2. Description of the Related Art Conventionally, an internally illuminated visual sign for displaying a color image of a landscape or the like has a color film or a color poster arranged on the front surface of a light box, which is used for a fluorescent lamp or the like installed in the light box. It is designed to be illuminated from the inside by a white light source. However, since a color image displayed on such an internally-illuminated display device only expresses the original constant image of the color image, the color image is not interesting and there is a dislike that it soon becomes tired of being viewed.

On the other hand, as an internally lit display device used for a signboard or the like for displaying characters and patterns, light sources of three primary colors of red, blue and green arranged in a light box are turned on and off by a dimmer. Illuminating a light-transmissive display panel constituting the wall surface of the light box or a display panel provided with a punching section for display (Japanese Utility Model Publication No. 46-31228).
Japanese Utility Model Laid-Open No. 55-108471, 60-10487.
No. 2, etc.), a display pattern of fluorescent paint provided on an ultraviolet-transparent opaque display plate that constitutes the peripheral surface of the box is formed by the ultraviolet light emitted from a low-pressure mercury lamp (black light) arranged in the light box. Light emitting devices (Japanese Utility Model Publication No. 56-108183, No. 56-
156086).

However, in these internally-illuminated display devices, only the background color of the display pattern such as characters and patterns changes, or conversely, the color of the display pattern portion excluding the background changes, and Although it has an effect as a signboard or the like that it is easily noticeable due to the color change, it is not interesting because the displayed image itself does not change. Further, in particular, in the case where the display is made to emit light by ultraviolet rays, the display form is limited to that of fluorescent paint, and there is a problem that the cost is very high because a special light source and paint are used.

A first object of the present invention is to provide a completely new dimming visual sign capable of changing the displayed color image itself in various ways, and a second object is to reduce the production cost of the visual sign. With the purpose
A third object is to prevent color unevenness and the appearance of a light source image in the visual sign and to make the light box thinner.

[0006]

In order to achieve the above first object, a dimming visual sign according to the invention of claim 1 is arranged on the front surface of a light box and has a translucent surface having a color image. A display medium and red, blue, and green arranged in the light box along the surface direction of the surface display medium.
It is equipped with a light source of primary colors and a dimmer for turning on / off each light source individually. By selecting a combination of turning on / off of the light sources of three primary colors, the color of light that illuminates a color image from the inside White (red, blue, green three colors mixed), yellow green (green, blue two colors mixed), yellow (red, green two colors mixed), magenta (red, blue two colors mixed), red , Blue or green primary color, and can be variously changed.

According to the structure of the first aspect, when the whole irradiation light is set to white by mixing three colors of red, blue and green, the color image is displayed as its original image. When the illumination color is set, the illumination color and the color of each part of the color image itself are mixed, and an image image different from the original image is displayed. Therefore, using the same color image, it is possible to change the whole or partial image in various ways and perform a display with rich interest.

According to a second aspect of the present invention, in order to achieve the second object, the light source of each primary color in the dimming visual sign of the first aspect is a white lamp covered with a colored transparent tube. In this configuration, each light source emits red, blue, and white light from a white lamp through a colored transparent tube.
Since the colored lights of the respective primary colors of green are generated, the light sources of the three primary colors can be inexpensively constructed by using an ordinary fluorescent lamp as the white light, and thus the manufacturing cost of the entire dimming visual sign can be reduced.

According to a third aspect of the invention, in order to achieve the third object, a light-shielding layer is provided on the surface of each light source in the light control visual sign of the first or second aspect on the surface display medium side. ing. According to this configuration, since the direct-light monochromatic light traveling substantially vertically from each light source to the surface display medium side is blocked by the light shielding layer, the light source image does not appear on the display surface even if the distance between the light source and the surface display medium is short, and Luminance changes and color changes of light on the display surface are continuous gradations, and color unevenness due to the appearance of sharp brightness boundaries and emission color boundaries is less likely to occur.

According to a fourth aspect of the present invention, in the light control visual sign according to any one of the first to third aspects, since the light diffusing plate is disposed between the array portion of the light sources and the surface display medium, Since the light from the light source is incident on the diffusion plate and is diffused, it illuminates the surface display medium, so that the appearance of the light source image and color unevenness are alleviated.

According to a fifth aspect of the present invention, in the light control visual sign according to any of the first to fourth aspects, since the inner surface of the light box on the back side of the light source forms a reflecting surface, the two primary colors or the three primary colors emitting simultaneously are emitted. When the lights are emitted at the same time, the primary color lights reflected by the reflecting surface are mixed with each other, so that an independent single color gamut does not occur on the display surface, so that the expression of the light source image and the color unevenness are alleviated, and Since the light emitted to the back side contributes to the illumination, the illumination efficiency is improved.

According to the sixth aspect of the invention, in the light control visual sign according to the first to fifth aspects, since the color image of the surface display medium is a landscape image, as described above, the illumination light from the inside is turned on and off by the combination of turning on and off. It is possible to bring about a scene change such as morning, daytime, evening, and evening in the same landscape image by changing the color tone by dimming.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A light control visual sign according to an embodiment of the present invention will be specifically described below with reference to the drawings.

In FIGS. 1 and 2, (1) is a vertical rectangular light box, and a rear wall portion (1a) therein.
A green light source (2G), a red light source (2R), and a blue light source (2B) that are each in the form of a straight tube in the vicinity of, and are in the horizontal direction (hereinafter, these three primary color light sources are collectively referred to as the light source (2)).
, Each of which is arranged at a predetermined interval above and below,
Each light source (2) can be individually turned on and off and its brightness can be adjusted by a dimmer (3) attached to the outside of the side surface. Reference numeral (4b) denotes wiring portions provided on the left and right sides and the bottom of the light box (1).

On the front surface of the light box (1), a diffusing plate (5) made of translucent milky white plastic is formed in order from the inside, and a color photographic film for landscape image is formed on the outer surface side of the diffusing plate (5). In a state where the surface display medium (6) and the outer surface protection plate (7) made of transparent plastic are overlapped with each other, the fitting groove (1b) at the bottom of the light box (1) and the upper and left and right L-shaped sections are formed. The inner surface of the rear wall portion (1a) of the light box (1) is fitted through the edge frame member (8) to form a reflection surface by attaching an aluminum foil (9).

As shown in FIG. 3, in each light source (2), the fluorescent lamp (20) is covered with a colored transparent tube (21), and the white light of the fluorescent lamp (20) is applied to the tube (21).
When the light passes through, the light is colored and emitted as red, green, and blue primary color light. And each light source (2)
A light-shielding layer (22) is formed by sticking an opaque tape material on the surface of the surface display medium (6) side.

In the dimming visual sign having the above-mentioned structure, the primary color light emitted from each light source (2) is partially blocked by the light shielding layer (22), but otherwise the front color light is directed to the front diffuser plate (5). It becomes a light component that is obliquely directly incident and a component that is reflected by the back wall portion (1a) and then is incident on the diffuser plate (5), and is displayed on the surface display medium (6) in a state of being diffused by the diffuser plate (5). Illuminate from the inside and display the landscape image. At this time, the illumination colors are white (a mixture of three colors of red, blue and green) and yellow-green (green and blue) depending on the combination of turning on and off the light sources (2) of the three primary colors through the dimmer (3). 2 color mixture), yellow (2 of red and green)
(Color mixture), magenta (mixture of two colors red and blue), and any of the primary colors of red, blue, and green.

The total irradiation light is divided into red, blue, and green.
When set to white by color mixing, the landscape image is displayed as the image of the original color photograph, but when set to other illumination colors, this illumination color and the colors of each part of the landscape image itself are mixed. A different image image from the original color photo image is displayed. For example, the same landscape image can express scene changes such as morning, daytime, evening, and evening, and has high eye-gaze (eye catching effect). ) Can be demonstrated. Also,
Such a change in illumination color can be performed over the entire landscape image, and can be performed only for a part of the landscape such as a sky portion or a water surface portion.

In the display of this landscape image, in addition to the light components directed from each light source (2) substantially perpendicular to the surface of the display medium (6) being cut by the light shielding layer (22), each light source ( Since the light emitted from 2) is reflected and mixed at the back wall portion (1a), and the light incident on the diffusion plate (5) is diffused, the light source image (the shape of the light source) does not appear on the display surface, In addition, the brightness and color of light on the display surface are gradually changed in continuous gradation, so that no sharp brightness boundary or emission color boundary appears and no color unevenness occurs. Therefore, especially in a landscape image, a natural and beautiful scene is always displayed even if the illumination light changes in various shades. Further, since the light emitted from the light source (2) to the back side is also reflected as described above and contributes to the illumination, high illumination efficiency can be obtained.

[Lighting Display Test] Next, in the dimming visual sign having the configuration shown in FIGS. 1 to 3, a color photographic film of tropical beach scenery was used as the surface display medium (6), and a green light was obtained by the dimmer (3). Light source (2G), red light source (2R),
The color tone of the illumination light and the obtained scene image when the combination of turning on and off each of the blue light source (2B) was changed were examined. Table 1 shows the results. When each light source (2) is turned off, the current at maximum brightness is set to 100%, and the current is about 10%.
A weak current is flowing, and a slight amount of light is emitted.

[0021]

[Table 1]

In order to change the scene as described above, the operation of the dimmer (3) is automated through a timer and a control device, and a pattern change of turning on / off of each light source (2) and a continuation time of each pattern or By setting the change time in advance, the change time may be automatically performed in a predetermined time cycle. As the light control means, not only switching on / off of each light source (2) but also setting so that the brightness of each light source (2) can be increased / decreased by a current change, and the entire display surface is changed by a relative brightness change of the three primary colors. It is also possible to change the shade of the illumination color for some areas.

As the surface display medium (6) having a color image, a plastic film or plate material such as the color photographic film used in the above embodiment is suitable, but the base material is paper such as a color poster. However, as long as at least the light-colored portion has a light-transmitting property, it can be used without any trouble. Further, the reflecting surface in the light box (1) may be provided not only on the back side of the light source (2) but also on the left and right side surfaces and the upper and lower surfaces. Besides, in the dimming visual sign of the present invention, the structure and shape of the light box (1) and the light source (2).
Shape, number and arrangement direction, installation position of dimmer (3), etc.
The design of the detailed configuration can be variously changed in addition to the embodiment.

[0024]

According to the invention of claim 1, by selecting the combination of turning on and off the light sources of the three primary colors as the internally illuminated dimming visual sign, the color image of the surface display medium can be changed to various colors including white. In addition to the original image of the color image when the irradiation light is white, a variety of images different from the original image can be obtained by the same color image. It is possible to display an image, to change the whole or partial image in various ways to perform an interesting display, and to provide a high gaze.

According to the second aspect of the present invention, in the above-mentioned dimming visual sign, the light sources of the three primary colors can be inexpensively constructed by using an ordinary fluorescent lamp or the like, so that the overall manufacturing cost can be reduced. There is.

According to the third aspect of the present invention, as the above-mentioned light control visual sign, the light component directly radiating in a direction substantially perpendicular to the surface display medium is cut by the light shielding layer provided in each light source, whereby the light source. The light source image does not appear on the display surface even if the distance between the display surface and the display medium is short, and color unevenness due to the appearance of sharp luminance boundaries and emission color boundaries does not easily occur on the display surface, and thus the light box can be configured to be thin, Provided is one that can be easily mounted on a wall or embedded and can display a beautiful image.

According to the invention of claim 4, as the above-mentioned light control visual sign, a light source image and a color unevenness hardly occur due to the diffusing action of light by the diffusion plate, and a beautiful image can be displayed.

According to the fifth aspect of the invention, since the light control visual sign has a reflecting surface on the back side of the light source, expression of the light source image and color unevenness are alleviated, and high illumination efficiency is obtained. What you get is provided.

According to the sixth aspect of the present invention, particularly when a landscape image is displayed as the dimming visual sign,
The same landscape image that can bring about scene changes such as morning, noon, evening, and evening is provided.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a dimming visual sign according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a main part of a tuning light visual sign.

FIG. 3 is a sectional view of a light source of a tuned optical visual sign.

[Explanation of symbols]

 (1) ... light box (1a) ... rear wall part (2) ... light source (2R) ... red light source (2G) ... green light source (2B) ... blue light source (20) ... fluorescent lamp (white lamp) (21) ... Colored transparent tube (22) ... Shading layer (5) ... Dimmer (6) ... Diffusion plate (7) ... Transparent protective plate (9) ... Aluminum foil (reflection surface)

Claims (6)

[Claims] 1. A translucent surface display medium having a color image disposed on the front surface of a light box, and red arranged in the light box along a surface direction of the surface display medium.
A dimming visual sign that includes light sources of three primary colors of blue and green, and a dimmer that individually turns on and off each light source. 2. The dimming visual sign according to claim 1, wherein the light source of each primary color comprises a white lamp covered with a colored transparent tube. 3. The dimming visual sign according to claim 1, wherein a light-shielding layer is provided on the surface of each light source on the surface display medium side. 4. The dimming visual sign according to claim 1, wherein a light diffusing plate is provided between the array of light sources and the surface display medium. 5. The dimming visual sign according to claim 1, wherein an inner surface of the light box on the back side of the light source forms a reflecting surface. 6. The dimming visual sign according to claim 1, wherein the color image on the planar display medium is a landscape image.